!5122 array.flat(undefed)没有处理flat为undefined的情况

Merge pull request !5122 from 韩靖/master

ecmascript/builtins/builtins_array.cpp

@@ -2744,12 +2744,13 @@ JSTaggedValue BuiltinsArray::Flat(EcmaRuntimeCallInfo *argv)
     // b. If depthNum < 0, set depthNum to 0.
     if (argc > 0) {
         JSHandle<JSTaggedValue> msg1 = GetCallArg(argv, 0);
-        JSTaggedNumber fromIndexTemp = JSTaggedValue::ToNumber(thread, msg1);
-        RETURN_EXCEPTION_IF_ABRUPT_COMPLETION(thread);
-        depthNum = base::NumberHelper::TruncateDouble(fromIndexTemp.GetNumber());
-        depthNum = depthNum < 0 ? 0 : depthNum;
+        if (!msg1->IsUndefined()) {
+            JSTaggedNumber fromIndexTemp = JSTaggedValue::ToNumber(thread, msg1);
+            RETURN_EXCEPTION_IF_ABRUPT_COMPLETION(thread);
+            depthNum = base::NumberHelper::TruncateDouble(fromIndexTemp.GetNumber());
+            depthNum = depthNum < 0 ? 0 : depthNum;
+        }
     }
-
     // 5. Let A be ? ArraySpeciesCreate(O, 0).
     uint32_t arrayLen = 0;
     JSTaggedValue newArray = JSArray::ArraySpeciesCreate(thread, thisObjHandle, JSTaggedNumber(arrayLen));

test/moduletest/BUILD.gn

@@ -18,6 +18,7 @@ group("ark_js_moduletest") {
     "allocatearraybuffer",
     "array",
     "arrayfindlast",
+    "arrayflat",
     "arrayfindindex",
     "arrayforeach",
     "arrayjoin",
@@ -161,6 +162,7 @@ group("ark_asm_test") {
     "allocatearraybuffer",
     "array",
     "arrayfindlast",
+    "arrayflat",
     "arrayfindindex",
     "arrayforeach",
     "arrayjoin",
@@ -283,6 +285,7 @@ group("ark_asm_single_step_test") {
     "allocatearraybuffer",
     "arrayfindindex",
     "arrayfindlast",
+    "arrayflat",
     "arrayforeach",
     "arrayjoin",
     "arrayprotochange",

test/moduletest/arrayflat/BUILD.gn

@@ -0,0 +1,18 @@
+# Copyright (c) 2021 Huawei Device Co., Ltd.
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+import("//arkcompiler/ets_runtime/test/test_helper.gni")
+
+host_moduletest_action("arrayflat") {
+  deps = []
+}

test/moduletest/arrayflat/arrayflat.js

@@ -0,0 +1,23 @@
+/*
+ * Copyright (c) 2021 Huawei Device Co., Ltd.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+/*
+ * @tc.name:async
+ * @tc.desc:test async function
+ * @tc.type: FUNC
+ * @tc.require: issueI5NO8G
+ */
+const input = [1, [2], [[3]]];
+print(input.flat(undefined));

test/moduletest/arrayflat/expect_output.txt

@@ -0,0 +1,14 @@
+# Copyright (c) 2021 Huawei Device Co., Ltd.
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+1,2,3